SOLUTION: Solving & Graphing Quadratic Equation School of electronics P=i^2(20) represent power in DC circuit with a resistance of 20 ohms, p is the power (in Watts), and I (in amps) i

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Question 960410: Solving & Graphing Quadratic Equation
School of electronics
P=i^2(20) represent power in DC circuit with a resistance of 20 ohms, p is the power (in Watts), and I (in amps) is the current. (Note: This relationship is of the same form as many of the quadratic you will see in this chapter; in particular y=x^2(20). As a result the methods you use to solve similar quadratic would apply here.) if the power is 168.2 Watts, what is the current?

Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
+P+=+i%5E2%2A20+
+P+=+168.2+
+168.2+=+i%5E2%2A20+
divide both sides by +20+
+i%5E2+=+168.2%2F20+
+i%5E2+=+8.41+
+i+=+2.9+
i = 2.9 amps